Stapler base



FIG. 1 is a front elevational view of the stapler base showing my new design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a left side elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof; and,

FIG. 7 is an isometric view thereof, the broken line showing of the stapler magazine cover and cap are shown for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a stapler base, as shown and described. 